Masks are antisocial at best, a necessary nuisance. After playing around with graphic design on the outside and a LED panel run by a computer, I had a brainfart.
Put Windows in it. Literally XD
I took my existing mask design, cut a hole and put a clear panel in it with a couple of filters. I've used Polypropylene so it doesnt fog up. It probably will come Winter but there isnt much I can about that without forced ventilation.
Thats still an option, it wont take much to replace the filters with small 5v fans if need be.
Its quick and simple, just a pair of scissors, a hot-glue gun and a needle and thread required to make it. Materials are Neoprene sheet, polypropylene sheet (I've used A4 sheet as I had it laying around but a pop bottle is pre-curved...) and a couple of gaskets, plain fabric glued either side of them, and a small strip of metal with fabric glued to it to prevent glasses fog.